Unverified50% confidenceFactExact time
The default character limit for MCP tool descriptions and server instructions has been increased from 2,048 to 4,096.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/9/2026
First Seen
Valid until: 1/7/2027
Sources
Related Entities
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UnverifiedMCP握手流程中Client发送initialize请求附带协议版本（如2024-11-05、2025-03-26）和可选能力列表，Server选择双方共同支持的最高版本回应68% similarUnverifiedCommon anti-patterns for MCP servers include excessive authorization, lack of request source validation, hardcoding sensitive credentials on the server side, and insufficient filtering of instructions passed in by agents.66% similarUnverifiedThe initialization timeout default for Stdio-type MCP servers has been increased from 3 seconds to 10 seconds.64% similarUnverifiedIn the older version of MCP, 50% or more of the messages for some servers were protocol messages only (such as initialize, list tools, etc.).64% similar
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